USEUROPEAFRICAASIA中文双语FrançaisHOMECHINAWORLDBUSINESSLIFESTYLECULTURETRAVELWATCHTHISSPORTSOPINIONREGIONALFORUMNEWSPAPERChina Daily PDFChina Daily E-paperMOBILEWorldAsia-PacificAmericasEuropeMiddle EastAfricaChina-USChina-EuropeChina-JapanChina-AfricaHome / World / EuropeDinosaur restores image as scaly killer after feather flap
China Daily | Updated:2017-06-08 07:31PARIS – Tyrannosaurus rex had scales, not feathers, said a study on Wednesday, which rescues the giant lizards reputation as a fearsome killer with a rough-and-tough hide.Recent research has claimed to provide evidence for feathers in ancestors of T. rex, and suggested the iconic carnivore may itself have sported birdlike plumage rather than reptilian scales.Those findings challenged a long-held contention that large-bodied dinos had no feathers, requiring them for neither warmth nor flight.For the new study, an international team of scientists tracked down museum samples of skin from T. rex and several of its cousins in the tyrannosaurid family, and compiled a database of fossilized hide impressions.These included skin patches of the neck, pelvis and tail of a T. rex from the Houston Museum of Natural Science, as well as samples from four other members of the extended tyrannosaurid family.That group roamed the planet during the Late Cretaceous, which extended from 99 million to 65.5 million years ago, when an asteroid slammed into Earth and wiped out all land-dwelling dinos.Compelling evidenceThe team concluded that “extensive feather coverings” in tyrannosauridswhich lived much earlierwere already lost in the common forefather of T. rex and its cousins about the time the Late Cretaceous began.The data provides “compelling evidence” of an entirely scaly covering for T. rex, the team wrote in the Royal Society journal Biology Letters.”Our discovery of fossilized scaly skin similar to that of modern reptiles on the bodies of a wide variety of tyrannosaur species (including T. rex) … paints a more traditional scaly-skinned picture of these huge predators,” they wrote in a press summary.This suggested, in turn, “that most (if not all) large-bodied tyrannosaurids were scaly and, if partly feathered, these were limited to the dorsum (back),” they wrote.The study begged the question of whyafter T. Rexs ancestors evolved feathers from an even more ancient scaly forebearthe giant tyrannosaurs reverted back to scales.Paleontologists believe the first birds appeared 150 million years ago and were descendants of small feathered dinosaurs.The first dino feathers were simple hollow shafts, which evolved over time into something resembling their modern shape, engineered for flight.Agence France-pressePhotoUK voters head for polling booths as countrys general election gets under wayPolls on eve of UK election suggest PM May will boost majorityTrump offers to help resolve rift between Qatar, Gulf nationsNATO formally welcomes Montenegro into alliance8 killed in Irans parliament shootingSwedens National Day celebrated in StockholmMost Viewed in 24 HoursWeekly PhotoThe world in photos: May 29 – June 4NewsmakerChina supports marine-friendly blue economyTencent among worlds 100 most valuable brandsSpecialPresident Xi visits Kazakhstan, attends SCO summitPremier Li visits Germany, Belgium, attends the China-EU Leaders MeetingReporters JournalEducation should be lifelong, and so should the chance to dreamCleaning up water gets a boost from brand new methodChina-JapanPeople are key to peace: former Japan officialChina-USUS sees another side of ChinaChina-EuropeTwo pandas from China greeted in NetherlandsChina-AfricaSudanese, Chinese doctors reflect human face of medical professionBACK TO THE TOPHOMECHINAWORLDBUSINESSLIFESTYLECULTURETRAVELWATCHTHISSPORTSOPINIONREGIONALFORUMNEWSPAPERChina Daily PDFChina Daily E-paperMOBILECopyright 1995 -var oTime = new Date();
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